Abstract: An earphone of adjustable size to fit the ears of different users includes a housing, a speaker, an air path, an inflatable earplug, and a control assembly. The speaker and at least one part of the air path are arranged in the housing. The inflatable earplug communicates with the air path and is detachably attached to the housing. The control assembly is arranged outside of the housing and configured to inflate and deflate the inflatable earplug through the air path.

Abstract: An electronic device includes a circuit board, a protective assembly, and a protective film. The protective assembly providing a cavity is arranged on one side of the circuit board. The protective assembly includes a first protective unit and a second protective unit. A third through hole communicating with the cavity is defined in the first protective unit. A supporting surface is defined on the second protective unit facing the third through hole. A projection of the third through hole is overlapped with a projection of the supporting surface along the first direction. The protective film is coupled to the protective assembly and arranged in the cavity to divide the cavity into a first cavity and a second cavity. The above-mentioned electronic device resists deformation of the protective film by setting the second protective unit between the circuit board and the protective film.

Abstract: An electronic device includes a circuit board, a protective assembly, and a protective film. The protective assembly providing a cavity is arranged on one side of the circuit board. The protective assembly includes a first protective unit and a second protective unit. A third through hole communicating with the cavity is defined in the first protective unit. A supporting surface is defined on the second protective unit facing the third through hole. A projection of the third through hole is overlapped with a projection of the supporting surface along the first direction. The protective film is coupled to the protective assembly and arranged in the cavity to divide the cavity into a first cavity and a second cavity. The above-mentioned electronic device resists deformation of the protective film by setting the second protective unit between the circuit board and the protective film.

Abstract: An earphone of adjustable size to fit the ears of different users includes a housing, a speaker, an air path, an inflatable earplug, and a control assembly. The speaker and at least one part of the air path are arranged in the housing. The inflatable earplug communicates with the air path and is detachably attached to the housing. The control assembly is arranged outside of the housing and configured to inflate and deflate the inflatable earplug through the air path.

Abstract: A display module includes a middle frame, a display screen, a coil, and a magnet. The display screen is arranged on the middle frame. The display screen and the middle frame cooperatively define a receiving space. The coil defines an accommodation space. A portion of the magnet is accommodated in the accommodation space. The magnet and the coil are received in the receiving space. One of the magnet and the coil is arranged on the display screen, and the other one of the magnet and the coil is arranged on the middle frame.

Abstract: A portable electronic device defines a substantially enclosed interior space and includes a detecting pin, a processor and a reeling mechanism. The reeling mechanism drives a headset assembly to be withdrawn from and retracted into the enclosed interior space. The reeling mechanism includes an urging member. When the headset assembly is withdrawn from the enclosed interior space, the urging member is in an elastically deformed state and the detecting pin is floating and triggers a first control signal to the processor. The processor activates the headset assembly in response to the first control signal. When the headset assembly is refracted into the enclosed interior space, the urging member returns to its original state and is electronically contacted with the detecting pin and the detecting pin triggers a second control signal to the processor. The processor inactivates the headset assembly in response to the second control signal.